Trisazo dye.



ire srans Pa r AUGUST BLANK, F LEVERKUSEN, NEAR COLOGNE, GERMANY, ASSIG-NOR TO FARBEN- FABRIKEN VORM. FRIEDR. BAY-ER & 00., OF ELBERFELI), GERMANY, A CORPORA- 'lION OF GERMANY.

TRISAZO DYE.

No Drawing.

, To all 107mm it m (13 concern Be it known that I, AUGUsT BLANK, doctor of philosophy, chemist, citizen of the German Empire, residing at Leverkusen, near Cologne, Germany, have 1nvented new and useful Improvements in Trisazo Dye, of

which the following is a specification.

The present application is a continuation in partof my application Serial No. 630646,

filed June 1, 1911 and concerns the manufacture and production of new azo dye- .stufis which 'are' obtained by combining the 3 diazo compounds prepared from aminosultonic acid, 0. g. sulfanilic acid, etc, with an a'nim of the benzene series hav ng a free para-position to the amino group, rediaz'otiz mg the aminoazo compounds thus obtained,

combining the diazoazo compounds with a second molecule of the same or another of such an amin, such as anilin, toluidin, Xylidin, aminophcnol ethers, cresidin, rediazotizing the aminodisazo compounds and combining the diazo compounds with a dioxyquinolin, and more particularly with alpha-' amin are obtained. I

80ml l ts...

soluble in water with a brown coloration and yielding upon reduction with stannous chlorid and hydrochloric acid Q-naphthylamin- 3.6-disulfonic acid, diaminomethyl-benzene and aminodioxyquinolin. It dyes cotton in orange-brown shades fast to light. Q-naphthylamin-4.8-disulfonic acid, sulfanilic acid and anilin, etc, can be used as first component.

Specification of Letters Patent.

Application filed April 1, 1912.- Serial No. 687,832.

Patented Feb. 4, 191 3.

In order to illustrate the new process more fully the following exampleis given, the parts being by weight-347 parts of the sodium salt of 2-naphthylamin-3.6-disulfonic acid are diazotized at about 15-20? C. with 69 parts of sodium nitrite. The diazo solution is combinedwith a solution of 107 parts of'meta-toluidin 'in water containing 150 parts of hydrochloric acid, 130 parts'ot' sodium acetate are slowly added. The mixture is then neutralized with sodium carbonate,caustic. soda lye is added to prepare the sodium salt oft-he dye, 69 parts of sodium nitrite are added and then it is diazotize'dby adding zit-1045 0.450 parts of hydrochloric acid. The diazotization is complete after stirring for 3 to 4 hours and the resulting dia-zo compound is then again combined in the same manner with 10? parts of meta-toluidin. The second intermediate product is then dissolved by the addition of NaOH and hot water. After filtration 69 parts of sodium nitrite are added and finally after cooling to Zero sufficient hydrochloric acid to produce diazotization. The diazodisazo compound which separates is filtered off, mixed with, water and added to an aqueous solution cooled to' 0 C. of 161 parts of dioxyquinolin containing 40 parts of caustic soda. and 250 parts of soda. After stirring for several hours the dye is isolated in the usual manner. It is after being dried and pulverized a brown powder having most probably the following formula:

I claim 1. The new trisazo dyestuflsol the following general formula:

and where at least one of the middle components is of the benzene series, and R the radical of dioxyquinolin, which dyestuffs 4 are after being dried and pulverized brown' and dark powders soluble in water generally with a brown to blue coloration, and dyeing cotton orange-brown to violet-brown shades 'fast to light, substantially as described. I I

2. The new trisazo dyestuffs f the following general formula:

R-N:NR,-N=N-R,-N:N-'R, where R is the radical of an aromatic sulfonic acid, R, and R the radicals of aro;

matic middle components of which at least one must be of the benzene series, and R the radical of dioxyquinolin, which dye stuffs are after being ried and pulverized brown and dark powders soluble in water -generally with an orange-brown to blue coloration, and dyeing cotton orange-brown to violet-brown shades fast to light, substantially as described.

3. The new trisazo dyestuffs of the following general formula:

cotton orange-brown to violet-brown shades fast to light, substantially as de's'cribed.

4. The new trisazo dyestu fi's of the following general formula:

where R is the radical of a sulfonic acid of the naphthalene series, B, and R, aromatic radicals of the benzene series, and R the radical of dioxyquinolin, which dyestufi's are after being dried and pulverized brown powders soluble in water generally with a brown coloration, and dyeing cotton orange-brown to red-brown shades fast to light, substantially as described.

5. The new trisazo dyestuffs of the following formula:

AUGUST BLANK. [1,. 5.

Witnesses HELE NUFER, ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentl.

- Washington, no. 

